package quiz;

import java.io.IOException;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class ClearQuizHistoryServlet
 */
@WebServlet("/ClearQuizHistory")
public class ClearQuizHistoryServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ClearQuizHistoryServlet() {
        super();

    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		//removes all results associated to a quiz
		DataBase db = (DataBase) request.getServletContext().getAttribute("db");
		
		int quizID = Integer.parseInt(request.getParameter("id"));
		
		db.deleteQuizHistory(quizID);
		
		//redirects to the admin page that shows them all users, 
		//quizzes, enables announcements, user removal, user promotion, etc.
		RequestDispatcher dpatch = request.getRequestDispatcher("ShowSelectedQuiz");
		dpatch.forward(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

}
